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3.2 Power Amplifier Module (RF3166, U501)
The RF3166 is a high-power, high-efficiency power amplifier module with integrated power control
that provides over 50dB of control range. The device is a self-contained 6mmx6mm module with
50Ω input and output terminals.
The device is designed for use as the final RF amplifier in GSM850, EGSM900, DCS and PCS
handheld digital cellular equipment and other applications in the 824MHz to 849MHz, 880MHz to
915MHz, 1710MHz to 1785MHz and 1850MHz to 1910MHz bands. The RF3166 incorporates
RFMD's latest VBATT tracking circuit, which monitors battery voltage and prevents the power
control loop From reaching saturation. The VBATT tracking circuit eliminates the need to monitor
battery voltage, thereby minimizing switching transients. The RF3166 requires no external routing
or external components, simplifying layout and reducing board space.
BAND SELECT
DCS/PCS
1
RFIN
2
TX ENABLE
3
VBATT
4
GND
5
VRAMP
6
GSM
7
RFIN
Figure 3-5 FUNCTIONAL BLOCK DIAGRAM
9
8
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3. TECHNICAL BRIEF
DCS/PCS
RFOUT
GSM
RFOUT
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